55 entries under spontaneous topic. ×
| casual(adjective, free, simple, fake, natural) | |
| unintentional(adjective, simple, natural, chance, casual) | |
| impromptu(adjective, free, simple, fake, informal) | |
| unprepared(adjective, free, ready, casual, unqualified) | |
| extemporaneous(noun, adjective, simple, informal, natural) | |
| offhand(noun, adjective, free, simple, fake) | |
| hit-or-miss(adjective, insignificant, irregular, senseless, planned) | |
| unstudied(adjective, free, simple, fake, natural) | |
| extempore(adjective, free, simple, fake, informal) | |
| impetuous(noun, adjective, simple, natural, casual) | |
| impulsive(noun, adjective, simple, violent, natural) | |
| involuntary(noun, adjective, simple, natural, casual) | |
| spur-of-the-moment(noun, adjective, free, impulsive) | |
| unconscious(adjective, simple, natural, casual, impulsive) | |
| improvised(adjective, free, simple, fake, informal) | |
| unrehearsed(adjective, free, informal, casual, unqualified) | |
| ad-lib(adjective, free, simple, fake, informal) | |
| uncontrived(adjective, simple, natural, casual, impulsive) | |
| unprompted(adjective, simple, natural, casual, impulsive) | |
| extemporary(adjective, free, casual, impulsive) |
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| APA | Smart Define. (2015). unplanned thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unplanned/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unplanned thesaurus" https://smartdefine.org/unplanned/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, unplanned thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unplanned/thesaurus/synonyms>. |
| MLA | Smart Define. "unplanned thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/unplanned/thesaurus/synonyms> |